Kalpana Datta (27 July 1913 – 8 February 1995), also Kalpana Joshi, was an Indian independence movement activist and a member of the armed independence movement led by Surya Sen, which carried out the Chittagong armoury raid in 1930. Later she joined the Communist Party of India and married Puran Chand Joshi, the General Secretary of the Communist Party of India in 1943. Early life Kalpana Datta (also commonly spelled Dutta) was born to a Baidya family in Sripur, a village of Chittagong District in the Bengal Province of British India (Sripur is now located in Boalkhali Upazila in Bangladesh). Her father Binod Behari Dattagupta was a government employee. After passing her matriculation examination in 1929 in Chittagong, she went to Calcutta and joined the Bethune College to study science. Soon, she joined the Chhatri Sangha (Women Students Association), a semi-revolutionary organization in which Bina Das and Pritilata Waddedar were also active member's. Armed independence movement The Chittagong armoury raid was carried out on 18 April 1930. Kalpana joined the "Indian Republican Army, Chattagram branch," the armed resistance group led by Surya Sen, in May 1931. In September 1931 Surya Sen entrusted her along with Pritilata Waddedar to attack the European Club in Chittagong. A week before the attack, she was arrested while carrying out reconnaissance of the area. She went into hiding after her release on bail. On 16 February 1933, the police encircled their hiding place in Gairala village. During this raid, Surya Sen was arrested but Kalpana managed to escape. To free Surya she tried to bomb the jail with explosives but failed. Kalpana was finally arrested on 19 May 1933. In the second supplementary trial of the Chittagong armoury raid case, Kalpana was sentenced to transportation for life. She was released in 1939. Later life Kalpana Datta graduated from the Calcutta University in 1940 and joined the Communist Party of India. She served as a relief worker during the 1943 Bengal famine and during the Partition of Bengal. She wrote an autobiographical book in Bengali "চট্টগ্রাম অস্ত্রাগার আক্রমণকারীদের স্মৃতিকথা" which was translated into English by Arun Bose & Nikhil Chakraborty with a preface by her husband Com. P. C. Joshi, a communist leader, as "Chittagong Armoury Raiders: Reminiscences," published in English in October 1945. In 1946, she contested in the elections for the Bengal Legislative Assembly as a Communist Party of India candidate from Chittagong but